Basal cell carcinoma demonstrates a characteristic combination of vascular, pigmented, and stromal features on dermoscopy. While no single finding is diagnostic in isolation, the presence of multiple classic features strongly supports the diagnosis.
The hallmark vascular feature of basal cell carcinoma is the presence of arborizing vessels.
Bright red, sharply focused branching vessels
Appear crisp and well-defined, often resembling an arteriogram
Best visualized with polarized dermoscopy
Sensitivity: 96.1%
Specificity: 90.0%
Clinical Pearl:
Sun-damaged skin may contain branching telangiectasias that mimic arborizing vessels; however, these vessels tend to appear blurry or hazy rather than sharply in focus.
Subtype Associations:
Fine, thin arborizing vessels → more common in superficial BCC
Thick, large-caliber arborizing vessels → more common in nodular or infiltrative BCC
Second most common vascular pattern
Not specific for BCC
Often encountered in recurrent tumors
Particularly concerning when present on a bubblegum-pink background
May occasionally be encountered, particularly on the lower extremities
Less reliable as a diagnostic clue for BCC
Persistent vascular lesions on the lower leg should not automatically be attributed to trauma
Discrete brown, gray, or blue-gray bulbous projections
Multiple radial extensions connected to a common off-center base
Histologically correlate with pigmented tumor islands
Radial lines converging toward a central darker hub
Often appear as a wheel with spokes extending from the center
Dark central pigmentation surrounded by a fuzzy peripheral halo
May represent an early or evolving pigmented structure
Numerous well-circumscribed pinpoint structures
Brown, gray-brown, or blue-gray in color
Typically distributed in a haphazard, non-aggregated pattern
Histologically correspond to free melanin or melanophages
Well-circumscribed round or oval blue to blue-gray structures
Often correlate histologically with nodular or micronodular tumor nests
Diffuse pink-white or white structureless zones
Best visualized using contact non-polarized dermoscopy
Correspond to altered collagen and fibroplasia
Bright reflective white structures visible only under polarized dermoscopy
May present as strands, blotches, or irregular shiny areas
Typically arranged in a haphazard, disorganized pattern rather than in parallel or perpendicular orientations
Represent collagen remodeling and fibroplasia
Red-orange structureless areas often associated with crust
Orange coloration corresponds to keratin
Red coloration reflects hemorrhage or exposed vasculature
Ulceration is a common feature of nodular BCC
Diffuse white stromal appearance
Reflects marked fibrosis within the tumor stroma
Morpheaform BCC may present clinically and dermoscopically as subtle white papules
These lesions often have fewer classic pigmented structures and may be more difficult to recognize